The following video demonstrates each syllable of the pinyin structure
and the exercise of pinyin/zhuyin with basic Chinese 4-tune pronunciation

Mandarin pinyin tunes
Click the framed calligraphic Chinese symbol icons
to link more related multi-character Chinese words!

shūn, shún, shǔn, shùn

third tune

shǔn

suck; lick 吮 shǔn

fourth tune

shùn

going smoothly; having no trouble obey; submissive 順 shùn

propitious; smooth going done successfully; without a hitch 順利 shùn lì
going smoothly 順 shùn	advantageous 利 lì

instant; moment; very short time 瞬 shùn

Chinese characters also pronunced shùn